The F-89G was a proposed advanced version of the F-89D. It was similar
in many respects to the F-89F, but it retained the pair of 7200 lb.st.
Allison J35-A-35 afterburning engines used by the late F-89D.
The F-89G was to have carried the Hughes MA-1 fire control system that
was being developed for the XF-106 project, and was to be armed with
Falcon air-to-air missiles. The F-89G never progressed any farther
than the design stage.
Sources:
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United States Military Aircraft Since 1909, Gordon Swanborough
and Peter M. Bowers, Smithsonian, 1989.
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F-89 Scorpion in Action, Aircraft Number 104, Larry Davis and
Dave Menard, Squadron/Signal Publications, 1990.
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Fighters of the United States Air Force, Robert F. Dorr and David
Donald, Temple Press Aerospace, 1990.
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The American Fighter, Enzo Angelucci and Peter Bowers, Orion, 1987.
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American Combat Planes, Third Enlarged Edition, Ray Wagner,
Doubleday, 1982.
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Post World War II Fighters, Marcelle Size Knaack, Office of Air Force History, 1986.